Compression coupling



Aug. 10 1926.

P. MUELLER ET AL COMPRESSION COUPLING Original Filed Jan. 9. 1920 2Sheets-Sheet 1 J 1 12 I V Iva - gwvemtow r m/40 Muefle/ J/770/7QSc/werman P. MUELLER ET AL I Aug. 10 1926.

COMPRESSION COUPLING Original Filed Jan. 9. 1920 2 Sheets-Sheet 2 Igwwmtow P/w/p Mae/k7 j/Wb/I 615060602740 Patented Aug. 10, 1926.

UNITED STATES PATIENT OFFICE.

PHILIP MUELLER AN D ANTON G. S CHUERMANN, OF DEQATUR, ILLIDTOIS,ASBIGNOBS TO ADOLPH MUELLER, TRUSTEE, OF DECATUR, ILLDN'OIS:

COMPRESSIOII COUPLING.

Original application filed January 9, 1920, Serial No. 350,455. Dividedand this application filed September 26, 1923. Serial No. 664,938.

The present invention, which is a division (under oflicial requirement)of applicants co-pending application, Serial No. 350,455, filed January9th 1920, and patented Nov. 18, 1924, Number 1,516,396, relates toimprovements in pipe couplings generally, butdeals more especially withpipe connections wherein the packing and washers customarily employed insuch installations are eliminated, and an efficient and economical fluidtight joint is provided by means of a preformed compression member thatis suitably interposed in the coupling, so that when the latter is setup the compression member is forced to expand in radial lines onlyagainst the inner pipe of the coupling so as .to insure an indentingengagement therewith.

While we have, for illustrative purposes, disclosed and described theinvention as applied to a faucet coupling, it will be understood thatthe. same is equally adapted for use with other types and forms ofcouplings.

Referring to the drawings wherein is disclosed a preferred embodiment ofour invention:

Figure 1 is a view partlyin section showing the coupling assembled, butnot set up or tightened. r

Figure 2 is an enlarged sectional view of the coupling set up.

Figure. 3 is a modified form of the invention.

' Figures 4, fications.

Figures 7 8 and 9 are sectional views of compression members ofdifferent forms.

Referring to the drawings, in which like numerals indicate like parts inthe several views, 10 denotes a cook or faucet of any suitableconstruction and design, which has been arbitrarily selected as theouter or telescoped section of the coupling. The inner or telescopingmember is conventionally indicated by the pipe 11, and is arranged to beadjustably secured to the threaded shank 12 of the cook 10 by means ofthe nut 13, which is interiorly recessed adjacent its inner end forengagement with the. corre- 5 and 6 are still further modispondingthreaded portion on the shank12.

The opposed walls 14 and 15 of the shank 12 and nut 13 are preferablyarranged perpendicular to the longitudinal axis of the pipe, and areeach provided with wedging imnuli or projections 16 and 17 respective-Figure 2 that upon the tightening of the nfit 13 on the shank 12 of thefaucet, the progecting annuli 16 and 17 are forced into bitingengagement with the compression member 18, so as to force the innerperiphcry of the member 18 into indenting engagemen-t with the outersurface of the pipe 11, as shown.

The compression member or. rin 18 is preferably made of a malleable metawhich 1s ofsuflici'ent hardness so that when the coupllng is set up itwill indent the member or p1pe 11, and will, under pressure, flow andexpand without fracture.

VVlnle the compression member 18 ispreferably shown as substantiallypentagonal in cross section; having its base in contact with the innerwall of the nut 12, and its converging sides terminating so as toprovide a penetrating edge 19, which is ar ranged when the coupling isset up to be forced radially into engagement with the outer periphery ofthe pipe 11,'it is to be understood that the ring 18 may assume various.other forms, such as shown in Figures7,8and9. w

In Figure. 3, wherein is disclosed a modified form of the invention, thecoupling is very similar to that shown in Figure 1, with the exceptionthat the compression member 20 is made smaller so as to be housed withina recess 21'formed in the shank 12 of the faucet. Such recess could, ofcourse, be formed in the nut, if desired; The annuli 16 and 17 functionin the same manner as heretofore described, to cause the lower portionof the compression member .20 to bite into and displace the metal of thecompression member, while the upper portion or outer periphery of thecompreslimit the upward movement thereof.

In the form disclosed in Figures 4 and 5, the invention differs fromthat heretofore disclosed in that the outer periphery of the.compression member 22 is inclined and engages a correspondinglyinclined surface on the inner wall of the coupling nut 23. The spreadingprojections 24 and 25 formed on the opposed walls of the coupling nutand the shank are arranged to bite into the compression member 22 in themanner heretofore described so as to force the latter radially intoindenting engagement with the outer surface of the pipe 26.

In this particular construction, it will be noted that there is a doubleaction on the compression member 22 as the coupling is set up, since theinclined wall of the nut 23 tends to force the compression member 22inwardly against the pipe 26 and the upsetting elements or projections24 and 25 bite into and distort the compression member 22 so as tosupplement and increase the radial movement of the compression member.

Figure 5 differs from Figure 4 in that the biting projection on thecoupling is dispensed with and the projection 27 on the end of theshank, together with the inclined surface 28 tend to force the innerperiphery of the compression member 29 into biting engagement with thepipe.

In the form of the invention disclosed in Figure 6 the member 30 and thecoupling nut 31 are of the same general construction as heretoforedescribed, the salient point of difference being in the formation andarrangement of the biting-elements 32 and 33, which are inclined orwedge faced on one side only so as to give a substantially triangularformation in cross section. By this construction, displacement of thecompression member 34 when the coupling is set up, takes place in adownward direction only so as to insure a maximum compression of themember 34 against the pipe 35. The biting members 32 and 33 are cut backor recessed at 36 so as to give proper biting edges and provideclearance space for the small amount of metal flow at the outerperiphery of the.

compression member when the coupling is set up.

In Figure 7 a preformed compression member 37 is shown in which aplurality of compressing elements 38 are formed on the inner peripherythereof so as to give a double upset or compression of the pipe ormember about which the compression member is constricted.

In Figure 8 the compression member or ring 39 is of generally ellipticalform in cross section with its maji r axis perpendicular to the centeraxis of the ring so as to render it readily adapted to compress and gripthe pipe when subjected to pressure.

In Figure 9 is shown a compression member 40 of multi-lateral orpolygonal form in cross section in which the inner faces slope orconverge so as to form edges 41, while the outer faces slope to a flatbase 42.

It is to be understood that mechanical modifications of the constructionherein shown and described may be made without departing from the spiritof the present invention and the scope of the appended claims.

We claim:

1. In a coupling, the combination of two telescoping pipes, a nutthreaded to the outer or telescoped pipe and having an expansion chamberin its rear end, a continuous preformed compression ring between theinner wall of the nut and the end wall of the outer or telescoped pipeand surrounding the inner or telescoping pipe, and means on the opposedwalls of said nut and outer pipe to engage and distort said compressionring so as to expand a portion of said ring in said expansion chamberand constrict it in radial lines only upon and indent-said inner pipe.

2. In a coupling, the combination of two telescoping pipes, a nutthreaded to the outer or telescoped pipe and having an expansion chamberin its rear end, a continuous preformed compression ring between thevertical inner wall of the nut and the end wall of the outer ortelescoped pipe and surrounding the inner or telescoping pipe, andprojec-' tions on the opposed wall of said nut and outerpipe to engageand distort said com pression ring so as to expand a portion of saidring in said chamber and constrict it in radial lines only upon andindent said inner or telescoped pipe and having an expansion chamber inits rear end, a continuous preformed compression ring between thevertical wall of the nut and the end wall of the outer or telescopedpipe and surrounding the inner or telescoping pipe, andcircumferentially arranged projections on the opposed walls of said nutand outer pipe to engage and distort said compression ring so as toexpand a portion of said rin in said chamber and constrict it in radialines only upon and indent said inner pipe.

4. In a coupling, the combination of two telescoping pipes, a nutthreaded to the outer Inn or telescoped pipe and having an expansionengage and distort said compression ring so as to expand a portion ofsaid rin in said chamber and constrict it in radial lines only upon andindent said inner pipe.

5. In a coupling, the combination of two telescoping pipes, a nutthreaded to the outer or telescoped pipe and having an expansion chamberin its rear end, a continuous preformed pentagonal compression ringbetween the vertical inner wall of the nut and the end wall of the outeror telescoped pipe and surrounding the inner or telescoping pipe, andprojections on the opposed wall of said nut and outer pipe to engage anddistort said compression ring so as to expand a portion of said ring andconstrict it in radial lines only upon and indent said inner pipe. I

6. In a coupling, the combination of two telescoping pipes, a nutthreaded to the outer or telescoped pipe and having an expansion chamberin its rear end, a continuous preformed compression member between thevertical inner wall of the nut and'the end wall of the outer ortelescoped pipe and surrounding the inner or telescoping pipe, saidmember having its base formed on its outer periphery and its convergingsides terminat-'- ing at a point centrally of its inner periphcry, andprojections on the opposed wall of said nut and outer pipe to engageanddisfort said compression member so as to expand a portion of said memberand constrict it in radial lines only upon and indent said inner pipe.

7. In a coupling, the combination of two telescoping pipes, a nutthreaded to the outer or telescoped pipe, said nut having an expansionchamber provided with an inclined wall, a continuous preformedpentagonally formed compression member having a correspondingly inclinedsurface positioned between the vertical inner wall of the nut and theend wall of the outer ontelescoped pipe and surrounding the inner ortelescoping pipe, and means projecting from the opposed walls of saidnut and outer plpe to engage and distort said compression member so asto expand a portion of said member in said expansion chamber andconstrict it in radial lines upon and indent said inner pipe.

8. In a coupling, the-combination of two telescoping pipes, a nutthreaded to the outer or telescoped pipe, said nut having an expansionchamber provided with an inclined wall, a continuous preformedcompression ring having a correspondingly inclined surface positionedbetween the inner wall of the nut and the end wall of the outer ortelescoped ipe and surrounding the inner or telescoplng pipe, and meansprojecting from the opposed walls of said nut and outer pipe to engageand distort said compression ring so as to expand a portion of said ringin said expansion chamber and constrict it in radial lines only andindent said inner pipe.

9. In a coupling, the combination of two telescoping pipes, a nutthreaded to the outer or telescoped pipe, and having an expansionchamber in its rear end, a continuous preformed compression ring betweenthe inner wall of the nut and the end wall of the outer or. telescopedpipe and surrounding the inner or telescoping pipe, and means projectingfrom the wall of the outer pipe for engaging and distorting saidcompressionring so as to expand said ring in said expansion chamber andconstrict it in radial lines only-upon and indent said inner pipe.

10. In a coupling, the combination of two telescoping pipes, a nutthreaded to the outer or telescoped pipe and having an expansion chamberin its rearwall, a continuous preformed compression ring between theinner wall of the nut and the end wall of'the outer or telescoped pipeand surrounding the inner or telescoped pipe, and inwardly projectingmeans in said expansion chamber adapted to engage and distort saidcompression ring so as to expand a portion of said ring and constrict itin radial lines only upon and indent said inner pipe.

In testimony whereof we have hereunto set our hands.

PHILIP MUELLER. ANTON o. SCHUERMANN.

